1 /* 2 * Setup platform devices needed by the Freescale multi-port host 3 * and/or dual-role USB controller modules based on the description 4 * in flat device tree. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation; either version 2 of the License, or (at your 9 * option) any later version. 10 */ 11 12 #include <linux/kernel.h> 13 #include <linux/platform_device.h> 14 #include <linux/fsl_devices.h> 15 #include <linux/err.h> 16 #include <linux/io.h> 17 #include <linux/of_platform.h> 18 #include <linux/clk.h> 19 #include <linux/module.h> 20 #include <linux/dma-mapping.h> 21 22 struct fsl_usb2_dev_data { 23 char *dr_mode; /* controller mode */ 24 char *drivers[3]; /* drivers to instantiate for this mode */ 25 enum fsl_usb2_operating_modes op_mode; /* operating mode */ 26 }; 27 28 static struct fsl_usb2_dev_data dr_mode_data[] = { 29 { 30 .dr_mode = "host", 31 .drivers = { "fsl-ehci", NULL, NULL, }, 32 .op_mode = FSL_USB2_DR_HOST, 33 }, 34 { 35 .dr_mode = "otg", 36 .drivers = { "fsl-usb2-otg", "fsl-ehci", "fsl-usb2-udc", }, 37 .op_mode = FSL_USB2_DR_OTG, 38 }, 39 { 40 .dr_mode = "peripheral", 41 .drivers = { "fsl-usb2-udc", NULL, NULL, }, 42 .op_mode = FSL_USB2_DR_DEVICE, 43 }, 44 }; 45 46 static struct fsl_usb2_dev_data *get_dr_mode_data(struct device_node *np) 47 { 48 const unsigned char *prop; 49 int i; 50 51 prop = of_get_property(np, "dr_mode", NULL); 52 if (prop) { 53 for (i = 0; i < ARRAY_SIZE(dr_mode_data); i++) { 54 if (!strcmp(prop, dr_mode_data[i].dr_mode)) 55 return &dr_mode_data[i]; 56 } 57 } 58 pr_warn("%s: Invalid 'dr_mode' property, fallback to host mode\n", 59 np->full_name); 60 return &dr_mode_data[0]; /* mode not specified, use host */ 61 } 62 63 static enum fsl_usb2_phy_modes determine_usb_phy(const char *phy_type) 64 { 65 if (!phy_type) 66 return FSL_USB2_PHY_NONE; 67 if (!strcasecmp(phy_type, "ulpi")) 68 return FSL_USB2_PHY_ULPI; 69 if (!strcasecmp(phy_type, "utmi")) 70 return FSL_USB2_PHY_UTMI; 71 if (!strcasecmp(phy_type, "utmi_wide")) 72 return FSL_USB2_PHY_UTMI_WIDE; 73 if (!strcasecmp(phy_type, "utmi_dual")) 74 return FSL_USB2_PHY_UTMI_DUAL; 75 if (!strcasecmp(phy_type, "serial")) 76 return FSL_USB2_PHY_SERIAL; 77 78 return FSL_USB2_PHY_NONE; 79 } 80 81 static struct platform_device *fsl_usb2_device_register( 82 struct platform_device *ofdev, 83 struct fsl_usb2_platform_data *pdata, 84 const char *name, int id) 85 { 86 struct platform_device *pdev; 87 const struct resource *res = ofdev->resource; 88 unsigned int num = ofdev->num_resources; 89 int retval; 90 91 pdev = platform_device_alloc(name, id); 92 if (!pdev) { 93 retval = -ENOMEM; 94 goto error; 95 } 96 97 pdev->dev.parent = &ofdev->dev; 98 99 pdev->dev.coherent_dma_mask = ofdev->dev.coherent_dma_mask; 100 101 if (!pdev->dev.dma_mask) 102 pdev->dev.dma_mask = &ofdev->dev.coherent_dma_mask; 103 else 104 dma_set_mask(&pdev->dev, DMA_BIT_MASK(32)); 105 106 retval = platform_device_add_data(pdev, pdata, sizeof(*pdata)); 107 if (retval) 108 goto error; 109 110 if (num) { 111 retval = platform_device_add_resources(pdev, res, num); 112 if (retval) 113 goto error; 114 } 115 116 retval = platform_device_add(pdev); 117 if (retval) 118 goto error; 119 120 return pdev; 121 122 error: 123 platform_device_put(pdev); 124 return ERR_PTR(retval); 125 } 126 127 static const struct of_device_id fsl_usb2_mph_dr_of_match[]; 128 129 static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node *np) 130 { 131 enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE; 132 133 /* 134 * returns 1 for usb controller version 1.6 135 * returns 2 for usb controller version 2.2 136 * returns 3 for usb controller version 2.4 137 * returns 4 for usb controller version 2.5 138 * returns 0 otherwise 139 */ 140 if (of_device_is_compatible(np, "fsl-usb2-dr")) { 141 if (of_device_is_compatible(np, "fsl-usb2-dr-v1.6")) 142 ver = FSL_USB_VER_1_6; 143 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.2")) 144 ver = FSL_USB_VER_2_2; 145 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.4")) 146 ver = FSL_USB_VER_2_4; 147 else if (of_device_is_compatible(np, "fsl-usb2-dr-v2.5")) 148 ver = FSL_USB_VER_2_5; 149 else /* for previous controller versions */ 150 ver = FSL_USB_VER_OLD; 151 152 if (ver > FSL_USB_VER_NONE) 153 return ver; 154 } 155 156 if (of_device_is_compatible(np, "fsl,mpc5121-usb2-dr")) 157 return FSL_USB_VER_OLD; 158 159 if (of_device_is_compatible(np, "fsl-usb2-mph")) { 160 if (of_device_is_compatible(np, "fsl-usb2-mph-v1.6")) 161 ver = FSL_USB_VER_1_6; 162 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.2")) 163 ver = FSL_USB_VER_2_2; 164 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.4")) 165 ver = FSL_USB_VER_2_4; 166 else if (of_device_is_compatible(np, "fsl-usb2-mph-v2.5")) 167 ver = FSL_USB_VER_2_5; 168 else /* for previous controller versions */ 169 ver = FSL_USB_VER_OLD; 170 } 171 172 return ver; 173 } 174 175 static int fsl_usb2_mph_dr_of_probe(struct platform_device *ofdev) 176 { 177 struct device_node *np = ofdev->dev.of_node; 178 struct platform_device *usb_dev; 179 struct fsl_usb2_platform_data data, *pdata; 180 struct fsl_usb2_dev_data *dev_data; 181 const struct of_device_id *match; 182 const unsigned char *prop; 183 static unsigned int idx; 184 int i; 185 186 if (!of_device_is_available(np)) 187 return -ENODEV; 188 189 match = of_match_device(fsl_usb2_mph_dr_of_match, &ofdev->dev); 190 if (!match) 191 return -ENODEV; 192 193 pdata = &data; 194 if (match->data) 195 memcpy(pdata, match->data, sizeof(data)); 196 else 197 memset(pdata, 0, sizeof(data)); 198 199 dev_data = get_dr_mode_data(np); 200 201 if (of_device_is_compatible(np, "fsl-usb2-mph")) { 202 if (of_get_property(np, "port0", NULL)) 203 pdata->port_enables |= FSL_USB2_PORT0_ENABLED; 204 205 if (of_get_property(np, "port1", NULL)) 206 pdata->port_enables |= FSL_USB2_PORT1_ENABLED; 207 208 pdata->operating_mode = FSL_USB2_MPH_HOST; 209 } else { 210 if (of_get_property(np, "fsl,invert-drvvbus", NULL)) 211 pdata->invert_drvvbus = 1; 212 213 if (of_get_property(np, "fsl,invert-pwr-fault", NULL)) 214 pdata->invert_pwr_fault = 1; 215 216 /* setup mode selected in the device tree */ 217 pdata->operating_mode = dev_data->op_mode; 218 } 219 220 prop = of_get_property(np, "phy_type", NULL); 221 pdata->phy_mode = determine_usb_phy(prop); 222 pdata->controller_ver = usb_get_ver_info(np); 223 224 /* Activate Erratum by reading property in device tree */ 225 pdata->has_fsl_erratum_a007792 = 226 of_property_read_bool(np, "fsl,usb-erratum-a007792"); 227 pdata->has_fsl_erratum_a005275 = 228 of_property_read_bool(np, "fsl,usb-erratum-a005275"); 229 230 /* 231 * Determine whether phy_clk_valid needs to be checked 232 * by reading property in device tree 233 */ 234 pdata->check_phy_clk_valid = 235 of_property_read_bool(np, "phy-clk-valid"); 236 237 if (pdata->have_sysif_regs) { 238 if (pdata->controller_ver == FSL_USB_VER_NONE) { 239 dev_warn(&ofdev->dev, "Could not get controller version\n"); 240 return -ENODEV; 241 } 242 } 243 244 for (i = 0; i < ARRAY_SIZE(dev_data->drivers); i++) { 245 if (!dev_data->drivers[i]) 246 continue; 247 usb_dev = fsl_usb2_device_register(ofdev, pdata, 248 dev_data->drivers[i], idx); 249 if (IS_ERR(usb_dev)) { 250 dev_err(&ofdev->dev, "Can't register usb device\n"); 251 return PTR_ERR(usb_dev); 252 } 253 } 254 idx++; 255 return 0; 256 } 257 258 static int __unregister_subdev(struct device *dev, void *d) 259 { 260 platform_device_unregister(to_platform_device(dev)); 261 return 0; 262 } 263 264 static int fsl_usb2_mph_dr_of_remove(struct platform_device *ofdev) 265 { 266 device_for_each_child(&ofdev->dev, NULL, __unregister_subdev); 267 return 0; 268 } 269 270 #ifdef CONFIG_PPC_MPC512x 271 272 #define USBGENCTRL 0x200 /* NOTE: big endian */ 273 #define GC_WU_INT_CLR (1 << 5) /* Wakeup int clear */ 274 #define GC_ULPI_SEL (1 << 4) /* ULPI i/f select (usb0 only)*/ 275 #define GC_PPP (1 << 3) /* Inv. Port Power Polarity */ 276 #define GC_PFP (1 << 2) /* Inv. Power Fault Polarity */ 277 #define GC_WU_ULPI_EN (1 << 1) /* Wakeup on ULPI event */ 278 #define GC_WU_IE (1 << 1) /* Wakeup interrupt enable */ 279 280 #define ISIPHYCTRL 0x204 /* NOTE: big endian */ 281 #define PHYCTRL_PHYE (1 << 4) /* On-chip UTMI PHY enable */ 282 #define PHYCTRL_BSENH (1 << 3) /* Bit Stuff Enable High */ 283 #define PHYCTRL_BSEN (1 << 2) /* Bit Stuff Enable */ 284 #define PHYCTRL_LSFE (1 << 1) /* Line State Filter Enable */ 285 #define PHYCTRL_PXE (1 << 0) /* PHY oscillator enable */ 286 287 int fsl_usb2_mpc5121_init(struct platform_device *pdev) 288 { 289 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev); 290 struct clk *clk; 291 int err; 292 293 clk = devm_clk_get(pdev->dev.parent, "ipg"); 294 if (IS_ERR(clk)) { 295 dev_err(&pdev->dev, "failed to get clk\n"); 296 return PTR_ERR(clk); 297 } 298 err = clk_prepare_enable(clk); 299 if (err) { 300 dev_err(&pdev->dev, "failed to enable clk\n"); 301 return err; 302 } 303 pdata->clk = clk; 304 305 if (pdata->phy_mode == FSL_USB2_PHY_UTMI_WIDE) { 306 u32 reg = 0; 307 308 if (pdata->invert_drvvbus) 309 reg |= GC_PPP; 310 311 if (pdata->invert_pwr_fault) 312 reg |= GC_PFP; 313 314 out_be32(pdata->regs + ISIPHYCTRL, PHYCTRL_PHYE | PHYCTRL_PXE); 315 out_be32(pdata->regs + USBGENCTRL, reg); 316 } 317 return 0; 318 } 319 320 static void fsl_usb2_mpc5121_exit(struct platform_device *pdev) 321 { 322 struct fsl_usb2_platform_data *pdata = dev_get_platdata(&pdev->dev); 323 324 pdata->regs = NULL; 325 326 if (pdata->clk) 327 clk_disable_unprepare(pdata->clk); 328 } 329 330 static struct fsl_usb2_platform_data fsl_usb2_mpc5121_pd = { 331 .big_endian_desc = 1, 332 .big_endian_mmio = 1, 333 .es = 1, 334 .have_sysif_regs = 0, 335 .le_setup_buf = 1, 336 .init = fsl_usb2_mpc5121_init, 337 .exit = fsl_usb2_mpc5121_exit, 338 }; 339 #endif /* CONFIG_PPC_MPC512x */ 340 341 static struct fsl_usb2_platform_data fsl_usb2_mpc8xxx_pd = { 342 .have_sysif_regs = 1, 343 }; 344 345 static const struct of_device_id fsl_usb2_mph_dr_of_match[] = { 346 { .compatible = "fsl-usb2-mph", .data = &fsl_usb2_mpc8xxx_pd, }, 347 { .compatible = "fsl-usb2-dr", .data = &fsl_usb2_mpc8xxx_pd, }, 348 #ifdef CONFIG_PPC_MPC512x 349 { .compatible = "fsl,mpc5121-usb2-dr", .data = &fsl_usb2_mpc5121_pd, }, 350 #endif 351 {}, 352 }; 353 MODULE_DEVICE_TABLE(of, fsl_usb2_mph_dr_of_match); 354 355 static struct platform_driver fsl_usb2_mph_dr_driver = { 356 .driver = { 357 .name = "fsl-usb2-mph-dr", 358 .of_match_table = fsl_usb2_mph_dr_of_match, 359 }, 360 .probe = fsl_usb2_mph_dr_of_probe, 361 .remove = fsl_usb2_mph_dr_of_remove, 362 }; 363 364 module_platform_driver(fsl_usb2_mph_dr_driver); 365 366 MODULE_DESCRIPTION("FSL MPH DR OF devices driver"); 367 MODULE_AUTHOR("Anatolij Gustschin <agust@denx.de>"); 368 MODULE_LICENSE("GPL"); 369